Abstract
The high temperature fatigue behaviour of secondary AlSi7Cu3Mg alloys has been investigated. The alloy has been solubilized and aged for different times to obtain the age-hardening profile. The peak hardness is reached at 180 °C after 4 h ageing treatment. Further, the hardness stabilizes showing a plateau in the range between 5 and 10 hours of ageing treatment. The heat treatment leads to a complete dissolution of Cu-rich phases, spheroidization of eutectic Si particles and precipitation inside the α-Al matrix. Several fatigue tests have been carried out on selected heat-treated specimens both at room and elevated temperatures (200 and 300 °C). The obtained results show how the fatigue strength decreases with increasing the testing temperature.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Shaha SK, Czerwinski F, Kasprzak W, Friedman J, Chen DL (2017) Ageing characteristics and high-temperature tensile properties of Al–Si–Cu–Mg alloys with micro-additions of Mo and Mn. Mater Sci Eng A 684:726–736
Yang Y, Zhong S-Y, Chen Z, Wang M, Ma N, Wang H (2015) Effect of Cr content and heat-treatment on the high temperature strength of eutectic Al–Si alloys. J Alloy Compd 647:63–69
Gariboldi E, Lemke JN, Rovatti L, Baer O, Timelli G, Bonollo F (2018) High-temperature behavior of high-pressure diecast alloys based on the Al–Si–Cu system: the role played by chemical composition. Metals 8(348):1–20
Rakhmonov J, Timelli G, Bonollo F (2017) Characterization of the solidification path and microstructure of secondary Al–7Si–3Cu–0.3Mg alloy with Zr, V and Ni additions. Mater Charact 128:100–108
Li RX, Li RD, Zhao YH, He LZ, Li CX, Guan HR, Hu ZQ (2004) Age-hardening behavior of cast Al–Si base alloy. Mater Lett 58:2096–2101
Camicia G, Timelli G (2016) Grain refinement of gravity die cast secondary AlSi7Cu3Mg alloys for automotive cylinder heads. Trans Nonferr Metals Soc China 26:1211–1221
CEN/TR 16748:2014, Aluminium and aluminium alloys—mechanical potential of Al–Si alloys for high pressure, low pressure and gravity die casting
Di Giovanni MT, Cerri E, Saito T, Akhtar S, Åsholt P, Li Y, Di Sabatino M (2016) Effect of copper additions and heat treatment optimization of Al–7% Si Aluminium Alloy. La Metall Ital 108:43–47
Yang H, Ji S, Yang W, Wang Y, Fan Z (2015) Effect of Mg level on the microstructure and mechanical properties of die-cast Al–Si–Cu alloys. Mater Sci Eng A 642:340–350
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
De Mori, A., Timelli, G., Berto, F. (2019). High Temperature Fatigue Behaviour of Secondary AlSi7Cu3Mg Alloys. In: Correia, J., De Jesus, A., Fernandes, A., Calçada, R. (eds) Mechanical Fatigue of Metals. Structural Integrity, vol 7. Springer, Cham. https://doi.org/10.1007/978-3-030-13980-3_7
Download citation
DOI: https://doi.org/10.1007/978-3-030-13980-3_7
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-13979-7
Online ISBN: 978-3-030-13980-3
eBook Packages: EngineeringEngineering (R0)